resolve 404ing link in readme. (Azure#18236)

Author: scbedd

sdk/cognitiveservices/azure-cognitiveservices-vision-computervision/README.md

@@ -238,7 +238,7 @@ image.save('thumbnail.jpg')
 
 ### General
 
-When you interact with the [ComputerVisionClient][ref_computervisionclient] client object using the Python SDK, the [`ComputerVisionErrorException`][ref_computervision_computervisionerrorexception] class is used to return errors. Errors returned by the service correspond to the same HTTP status codes returned for REST API requests.
+When you interact with the [ComputerVisionClient][ref_computervisionclient] client object using the Python SDK, the [`ComputerVisionErrorResponseException`][ref_computervision_computervisionerrorexception] class is used to return errors. Errors returned by the service correspond to the same HTTP status codes returned for REST API requests.
 
 For example, if you try to analyze an image with an invalid key, a `401` error is returned. In the following snippet, the [error][ref_httpfailure] is handled gracefully by catching the exception and displaying additional information about the error.
 
@@ -299,7 +299,7 @@ For more extensive documentation on the Computer Vision service, see the [Azure
 [pypi_pillow]:https://pypi.org/project/Pillow/
 
 [ref_computervision_sdk]: https://docs.microsoft.com/python/api/azure-cognitiveservices-vision-computervision/azure.cognitiveservices.vision.computervision?view=azure-python
-[ref_computervision_computervisionerrorexception]:https://docs.microsoft.com/python/api/azure-cognitiveservices-vision-computervision/azure.cognitiveservices.vision.computervision.models.computervisionerrorexception?view=azure-python
+[ref_computervision_computervisionerrorexception]:https://docs.microsoft.com/python/api/azure-cognitiveservices-vision-computervision/azure.cognitiveservices.vision.computervision.models.computervisionerrorresponseexception?view=azure-python
 [ref_httpfailure]: https://docs.microsoft.com/python/api/msrest/msrest.exceptions.httpoperationerror?view=azure-python